| Woods Christian G-4-129122 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 43.7K | 2.94M | Jan 1993 – Jul 2021 |
| McAllen, A. A. "B" G-4-141949 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 43.7K | 3.12M | Jan 1993 – Apr 2026 |
| Callaway, C. B. O-11-62550 | Geomark Resources, L.L.C. only | Roaring Springs, W. (Permo-Penn) | Motley | 1 | 43.7K | 146 | Jan 1993 – Apr 2026 |
| Tarzan "a" Callaway O-10-35924 | Diamondback E&P LLC only | Spraberry (Trend Area) | Martin | 1 | 43.6K | 126K | Nov 1998 – Oct 2023 |
| McAllen, A. A. G-4-124162 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 43.6K | 2.57M | Jan 1993 – Apr 2026 |
| McAllen Fieldwide Unit G-4-244843 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 43.6K | 6.11M | Nov 2008 – Apr 2026 |
| Rudloff, John O-8-314 | Wilson Well Service Inc. only | Callahan County Regular | Callahan | 21 | 43.2K | 21 | Jan 1993 – Apr 2026 |
| Guerra, A. E. G-4-181466 | Chevron U. S. A. Inc. only | McAllen Ranch (Guerra) | Hidalgo | 1 | 43K | 5.22M | Jan 2001 – Sep 2006 |
| McAllen, A. A. G-4-262659 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 43K | 2.49M | Aug 2011 – Apr 2026 |
| Guerra, A. E. G-4-169576 | Chevron U. S. A. Inc. only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 42.8K | 3.14M | Jul 1998 – Mar 2000 |
| Guerra "a" Gas Unit G-4-126509 | Dewbre Petroleum Corporation only | McAllen Ranch (Guerra) | Hidalgo | 1 | 42.7K | 3.24M | Jan 1993 – Aug 2001 |
| McAllen, A. A. G-4-173887 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 42.5K | 1.55M | Jun 1999 – Jun 2011 |
| McAllen, A. A. "B" G-4-147175 | Shell Western E&P only | McAllen Ranch (Vicksburg L, R-1) | Hidalgo | 1 | 42.3K | 660K | Oct 1993 – May 1995 |
| Woods Christian G-4-211588 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 41.9K | 2.88M | Aug 2005 – Feb 2021 |
| McAllen, A. A. "B" G-4-187701 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 41.9K | 3.34M | Dec 2001 – Apr 2026 |
| McAllen, A. A. "B" G-4-142297 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 41.8K | 1.74M | Jan 1993 – Apr 2026 |
| McAllen, A. A. "B" G-4-259306 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 41.7K | 2.16M | Oct 2010 – Sep 2023 |
| McAllen, A. A. "B" G-4-246997 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 41.7K | 3.12M | Apr 2009 – Apr 2026 |
| McAllen, A. A. "B" G-4-212274 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 41.6K | 1.7M | Aug 2005 – Apr 2026 |
| Callaway, P. C. O-4-1584 | Extex Operating Company only | London Gin | Nueces | 1 | 41.4K | 70 | Jan 1993 – Jul 2004 |
| McAllen, A. A. 'B' G-4-267664 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 41.3K | 1.62M | May 2012 – Apr 2026 |
| Beaurline G-4-218823 | Dewbre Petroleum Corporation only | McAllen Ranch (Vksbg W-Y) | Hidalgo | 1 | 41.3K | 1.63M | Mar 2006 – Apr 2026 |
| McCall Unit G-3-153161 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 41.2K | 2.75M | Jan 1995 – Jan 2025 |
| Snyder-Seales O-8-30502 | Tom-Tom Operating, LLC only | Callahan County Regular | Callahan | 19 | 41.1K | 0 | Dec 2009 – Apr 2026 |
| Simmons O-8-29849 | US. Fuels, Inc. only | Callahan County Regular | Callahan | 2 | 41K | 87.5K | Dec 2006 – May 2018 |
| McAllen, A.A. "B" G-4-128252 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 40.6K | 5.37M | Jan 1993 – Apr 2026 |
| McAllen Fieldwide Unit G-4-202258 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 40.6K | 1.49M | Apr 2001 – Sep 2005 |
| McAllen, A. A. G-4-241944 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 40.4K | 3.4M | Jun 2008 – Apr 2026 |
| McAllen, A.A. G-4-165441 | Totalfinaelf E&P USA Inc only | McAllen Ranch (Vicksburg S, S.) | Hidalgo | 1 | 40K | 1.68M | Aug 1997 – May 1999 |
| McAllen, A. A. G-4-174053 | Hilcorp Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 39.8K | 649K | May 1999 – May 2001 |
| Woods Christian G-4-126012 | OXY USA Inc. only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 39.6K | 3.61M | Jan 1993 – Jul 2016 |
| McAllen, A. A. G-4-269351 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 39.6K | 2.14M | Dec 2012 – Mar 2026 |
| Guerra, A. E. G-4-157313 | Chevron U. S. A. Inc. only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 39.5K | 3.46M | Jan 1996 – May 2000 |
| McCall, C. S. Etal O-13-13367 | Eagle Oil & Gas Co. only | Montague County Regular | Montague | 1 | 39K | 20 | Jan 1993 – Mar 2026 |
| McAllen, A. A. "B" G-4-262543 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 38.9K | 1.87M | Aug 2011 – Apr 2026 |
| McAllen, A. A. "A" G-4-160145 | OXY USA Inc. only | McAllen Ranch (Vicksburg K Cons) | Hidalgo | 1 | 38.9K | 1.45M | Sep 1996 – Mar 2012 |
| McAllen Fieldwide Unit G-4-166058 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 38.3K | 2.85M | Mar 1997 – Oct 1999 |
| Guerra, A.E. G-4-135080 | Texaco E & P Inc. only | McAllen Ranch (Guerra) | Hidalgo | 1 | 38.3K | 1.09M | Jan 1993 – Oct 1995 |
| McAllen, A.A. G-4-94774 | Shell Western E&P only | McAllen Ranch (Vicksburg S, SE.) | Hidalgo | 1 | 38.2K | 1.85M | Jan 1993 – Dec 1995 |
| Guerra, A. E. G-4-169533 | Chevron U. S. A. Inc. only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 38.1K | 3.18M | Jun 1998 – Mar 2002 |
| Guerra, A. E. G-4-138078 | Texaco E & P Inc. only | McAllen Ranch(vicksburg-U-V-,se) | Hidalgo | 1 | 37.6K | 4.41M | Jan 1993 – Jan 2001 |
| McAllen, A. A. "B" G-4-259309 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 37.6K | 1.66M | Oct 2010 – Apr 2026 |
| Guerra, A. E. G-4-199578 | Hilcorp Energy Company only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 37.5K | 3.52M | Nov 2003 – Jul 2007 |
| McAllen, A. A. G-4-160521 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 37.4K | 1.47M | Oct 1996 – Apr 2026 |
| Hunt Estate O-9-8006 | Callon Petroleum Operating Co only | Spraberry (Trend Area) | Reagan | 3 | 37.4K | 101K | Jan 1993 – Nov 2016 |
| Guerra, E. E. G-4-139523 | Dewbre Petroleum Corporation only | McAllen Ranch (Guerra) | Hidalgo | 1 | 37.4K | 5.12M | Jan 1993 – Mar 2019 |
| McAllen, A. A. "B" G-4-137555 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 37.2K | 2.46M | Jan 1993 – Apr 2026 |
| McAllen, A. A. G-4-177885 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 36.9K | 1.86M | May 2000 – Dec 2023 |
| Neal "6" O-9-15642 | Callon Petroleum Operating Co only | Spraberry (Trend Area) | Upton | 2 | 36.7K | 422K | Dec 2004 – Jan 2014 |
| Coates Ranch O-9-17172 | Callon Petroleum Operating Co only | Spraberry (Trend Area) | Reagan | 3 | 36.4K | 91.7K | Apr 2010 – May 2014 |